Hello! I was given Tylan soluable powder by vet for my flock with suspected MG. Samples sent to lab, awaiting results. I’m concerned he made a mistake on the duration of treatment though. 3 weeks?!? That doesn’t sound right does it? Just wanted to check before confronting/questioning him. I looked at numerous posts here on BYC, so many different dosing and durations... Whacha think?